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Finding the Fourth Proportional to 899.45, 1,241.21 and 501.10

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Solution

The fourth proportional to 899.45, 1,241.21 and 501.10 is: 691.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.45 : 1,241.21 = 501.10 : x
  2. Step 2: Convert to fraction form
    899.45/1,241.21 = 501.10/x
  3. Step 3: Cross multiply
    899.45x = 1,241.21 × 501.10
  4. Step 4: Simplify right side
    899.45x = 621,970.33
  5. Step 5: Solve for x
    x = 621,970.33/899.45
  6. Step 6: Final answer
    x = 691.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.